Sharpening device for disk plows.



PATENTED AUG. 16, 1904.

* I. "ovmrs SHARPENING DEVICE FOR DISK FLOWS.

APPLICATION FILED MAY 10. 1904.

N0 MODEL.

Patented August 16, 1904.

UNITED STATES PATENT OFFICE.

ISAAC OVENS, OF EAST SELKIRK, CANADA.

SHARPENING DEVICE FOR DISK PLOWS.

SPECIFICATION forming part of Letters Patent No. 767,710, dated August 16, 1904.

Application filed May 10,1904. Serial No- 207,249. (No model.)

To Ml whom, it may concern:

Be itknown that I, ISAAC OvnNs,of lEast Selkirk, in the Province of Manitoba, Canada, have invented certain new and useful Improvements in Sharpening Devices for Disk Plows, of which the following is a specification.

The object of my invention is to devise a simple device for sharpening the disks of disk plows while the machine is in use; and 1t con-i sists, essentially, of a bracket adapted to be secured to the arm of the plow, an emery-block carrier pivoted on the bracket and provided with a pressure-spring, and a water-tank carfigures.

shaped to support the different parts. .one end this bracket is provided with the Referring to Fig. 1, A is abracket suitably Near clevis B, by means of which the bracket may be clamped to the arm or beam of a plow. The bracket under the clevis has a V-shaped notch c formed therein, and a set-screw b isscrewed through the bracket, its point appearing at thebottom of the notch. By means of the clevis and set-screw the bracket may be vertically adjusted as desired. At or near the center of the bracket lugs C are formed. having two sets of pivot-holes 0 formed therein. D is an arm adapted to be pivotally connected with the lugs G at either set of pivot-holes. The end of the bracketA is bent round behind the arm D. Through this end of the bracket loosely passes a stem E, the other end of the stem being pivotally connected at d to the arm D. On this stem adjacent to the arm D is a collar 6. Between this collarand the bracket A is located a compression coil-spring F. A series of holes f are formed in the stem at its outer end,through any one of which may be passed a cotter-pin g behind the bracket. ()n the arm Ur is formed a fixed lug J.

A movable lug H is provided with hooked jaws IL, fitting the guides 2', formed on the arm D. Between these lugs is fitted the holder I for the abrasive. This holder comprises two jaws j, hinged together. (See Fig. 2.) In front of the pivot a bolt L is run through the jaws, by means of which they may be tightened upon the abrasive block K. When the holder is placed in position, a bolt J serves both as the pivot of the jaws, and as a clamp to draw the movable lug H tightly in contact with the holder. By loosening the bolt the holder may be swung to present the abrasive block at different angles to the disk edge and then clamped as adjusted. A fresh abrasive block is easily inserted at any time by loosening the bolt J.

A scraper-blade M is hinged on a bolt N, passing through a slot in in the end of the arm D. A pin Z on the arm passes through a hole in the scraper-blade, and a compression coilspring 0 is placed on the stem between the scraper-blade and the arm. This coil-spring will maintain the scraper-blade in yielding connection with the edge of the disk to clean the same before it reaches the abrasive. A pin m limits the forward movement of the blade. Of course this construction may be widely varied without departing from the spirit of my invention. It is evidentthat by clamping the blade in different positions in the slot the angle of the scraper-blade may be adjusted as required.

P is a water-tank secured to a post Q, the lower end of which fits a socket in the bracket A. This water-tank is provided with a tap 72, having its aperture located above the front edge of the abrasive K.

From the construction described it will be seen that the arm carrying the abrasive is yieldingly pressed forward, so that it may be maintained in contact with the edge of a disk, and that the forward position of the block is easily regulated by placing the cotter-pin g in different positions in the end of the stem E. The abrasive is further readily adjusted at different angles and a constant stream of water applied to its surface. The scraper is also adjustable to suit variousrequirements. For left-hand disks its position must be changed, and for this purpose I provide the slot 7: and the pin mat the end of the bracket A adjacent to the clevis B.

What I claim as my invention is 1. In a disk-sharpener for disk plows a bracket adapted for connection to the arm of the plow in combination with an abrasive block yieldingly held by the said bracket; a standard connected to the bracket and a water-tank carried by the standard and having an aperture over the surface of the abrasive block, substantially as described.

2. In a disk-sharpener for disk plows a bracketadapted for connection to the arm of the plow in combination with an arm; means for pivoting the arm on the bracket in any one of a plurality of positions; an abrasive block carried by the said arm; and a spring engaging the bracket and the arm and tending to maintain the block in contact with a disk, substantially as described.

3. In a disk-sharpener for disk plows a bracket adapted for connection to the arm of the plow in combination with an arm pivoted on the bracket; an abrasive block carried by the said arm; a spring engaging the bracket and the arm and tending to maintain the block in contact with a disk; a scraper-blade hinged on the end of the arm; and a spring engaging the arm and the scraper-blade and tending to maintain the block in contact with a disk, substantially as described.

4. In a disk-sharpener for disk plows a bracket adapted for connection to the arm of the plow in combination with an arm pivoted on the bracket; an abrasive block carried by the said arm; a spring engaging the bracket and the arm and tending to maintain the block in contact with a disk; a scraper-blade hinged on the end of the arm; a spring engaging the arm and the scraper-blade and tending to maintain the block in contact with a disk; and means for connecting the scraper-blade to the bracket in the reverse direction, substantially as described.

5. In a disk-sharpener for disk plows a bracket adapted for connection to the arm of the plow in combination with an arm pivoted on the bracket; an abrasive block; a holder comprising pivoted jaws and a clamping-bolt secured to the said arm and adapted to clamp the said block; and a spring engaging the bracket and the arm and tending to maintain the block in contact with a disk, substantially as described.

6. In a disk-sharpener for disk plows a bracket adapted for connection to the arm of the plow in combination with an arm pivoted on the bracket; an abrasive block; a holder adapted to clamp the said block; means for swinging the holder to suit the angle of a disk edge and for clamping it in position; and a spring engaging the bracket and the arm and tending to maintain the block in contact with a disk, substantially as described.

7. In a disk-sharpener for disk plows a bracket adapted for connection to the arm of the plow in combination with an arm pivoted on the bracket; a stationary lug on the arm; a lug slidably supported on the arm adjacent to the stationary lug; an abrasive block; a holder for the said block comprising jaws hinged together; a bolt passing through the lugs and the hinge and adapted to clamp them together; a bolt passing through the jaws in front of the hinge and adapted to clamp them on the block; and a spring engaging the bracket and the arm and tending to maintain the block in contact with a disk, substantially as described.

8. In a disk-sharpener for disk plows a bracket adapted for connection to the arm of the plow in combination with an arm; means for pivoting the arm on the bracket in any one of a plurality of positions; an abrasive block carried by the said arm; means for varying the angle of the abrasive block on an axis at right angles to the axis of the pivot of the said arm; and a spring engaging the bracket and the arm and tending to maintain the block in contact with the disk, substantially as described.

Signed at Manitoba, April 28, 1904:.

ISAAC OVENS.

In presence of- C. D. STOVEL, SAM. H. SHANK. 

